Influence of serrated sliding on subsequent steady slip in single filament model composite SiC/Pyrex

In ceramic composites, attention has been centered on the role of the fiber-matrix interface in controlling composite performance. Much effort has been focused on the assessment of interface parameters by the mechanical response of the model composites during fiber sliding. The load crack opening displacement curves, for the case of SCS-6 and SCS-9A glass systems, showed load fluctuations during fiber debonding and sliding. These fluctuations, whose amplitude varies with debond length, can be readily explained by the fact that the fiber slippage results from a succession of micro-instabilities, leading to small drops of interfacial shear stress.